Datasheet

MAX34446
PMBus Power-Supply Data Logger
25Maxim Integrated
Table 13. STATUS_CML
Table 14. STATUS_MFR_SPECIFIC
STATUS_CML (7Eh)
The STATUS_CML command returns 1 byte of information with contents as described in Table 13.
Note: When NV Fault Log Overwrite is enabled (NV_LOG_OVERWRITE = 1 in MFR_MODE), FAULT_LOG_FULL is set
when the fault log is full, but clears when the fault log is overwritten since two fault logs are cleared before each overwrite.
STATUS_MFR_SPECIFIC (80h)
The STATUS_MFR_SPECIFIC command returns 1 byte of information with a summary of the reason for a fault. The
STATUS_MFR_SPECIFIC message content is described in Table 14.
READ_VOUT (8Bh)
The READ_VOUT command returns the actual measured remote voltage. The 2 data bytes are in DIRECT format. When
the ENABLE pin is low, this command returns 0000h when read.
READ_IOUT (8Ch)
The READ_IOUT command returns the latest measured current value. The 2 data bytes are in DIRECT format. When
the ENABLE pin is low, this command returns 0000h when read.
READ_TEMPERATURE_1 (8Dh)
The READ_TEMPERATURE_1 command returns the temperature reading. The 2 data bytes are in DIRECT format. When
the ENABLE pin is low, this command returns 0000h when read.
BIT BIT NAME MEANING
7 COMM_FAULT An invalid or unsupported command has been received.
6 DATA_FAULT An invalid or unsupported data has been received.
5:1 0 These bits always return a 0.
0 FAULT_LOG_FULL MFR_NV_FAULT_LOG is full and needs to be cleared.
BIT BIT NAME MEANING
7 LOCKED Set when the device is password protected. This is a status-only bit and is not latched.
6 OT_WARN Overtemperature warning.
5 OT_FAULT Overtemperature fault.
4 WATCHDOG A watchdog reset has occurred.
3 0 This bit always returns a 0.
2 POWER_GOOD#
Individual power good has been negated. Only applies to the selected page. This is a status-
only bit and is not latched.
1 OC_FAULT IOUT overcurrent fault.
0 OC_WARN IOUT overcurrent warning.